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From: Paul Elschot <paul.elschot@xs4all.nl>
To: java-user@lucene.apache.org
Subject: Re: How to combine filter in Lucene 2.4?
Date: Sun, 9 Nov 2008 12:24:40 +0100
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Op Sunday 09 November 2008 11:56:37 schreef markharw00d:
>  >>this can't be nearly as fast as OpenBitSet.intersect() or union,
>
> respectively, can it?
>
> I had a similar concern but it doesn't seem that bad:
>
>
> https://issues.apache.org/jira/browse/LUCENE-1187?focusedCommentId=12
>596546#action_12596546
>
> The above test showed a slight improvement using bitset.or when it
> was recognised both docidsets were OpenBitSets. This optimisation is
> now in BooleanFilter.

Further to that, the current implementation of 
OpenBitSetDISI.inPlaceAnd() is not optimal, although it
should work just fine. A patch for a performance
improvement will follow.

Regards,
Paul Elschot


>
> Cheers
> Mark
>
>
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